反应详情

温度

0 °C

(2R)-2-(N-(tert-Butoxycarbonyl)-N-methylamino)-3-(2-naphthyl)propionic acid (517 mg, 1.57 mmol) and 1-hydroxy-7-azabenzotriazole (214 mg, 1.57 mmol) were dissolved in dichloromethane (6 ml) and N,N-dimethylformamide (6 ml). The mixture was cooled to 0° C. N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (301 mg, 1.57 mmol) was added. The reaction mixture was stirred for 15 min at 0° C. A solution of N-[2-(2-(methylamino)ethyl)phenyl]benzenesulfonamide (457 mg, 1.57 mmol) in dichloromethane (6 ml) and ethyldiisopropylamine (0.27 ml, 1.57 mmol) were added successively. The reaction mixture was stirred for 16 h, while it was warming up to room temperature. It was diluted with ethyl acetate (100 ml) and washed with a 10% aqueous sodium hydrogen sulfate solution (100 ml). The aqueous phase was extracted with ethyl acetate (2×30 ml). The combined organic layers were washed with a saturated aqueous solution of sodium hydrogen carbonate and dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (25 g), using ethyl acetate/heptane 1:1 as eluent, to give 785 mg of N-((1R)-1-{N-[2-(2-(phenylsulfonylamino)phenyl)ethyl]-N-methylcarbamoyl}-2-(2-naphthyl)ethyl)-N-methylcarbamic acid tert-butyl ester.

1. stirringThe reaction mixture was stirred for 16 h, while it
2. temperaturewas warming up to room temperature
3. washwashed with a 10% aqueous sodium hydrogen sulfate solution (100 ml)
4. extractionThe aqueous phase was extracted with ethyl acetate (2×30 ml)
5. washThe combined organic layers were washed with a saturated aqueous solution of sodium hydrogen carbonate
6. dry with materialdried over magnesium sulfate
7. customThe solvent was removed in vacuo
8. customThe crude product was purified by flash chromatography on silica (25 g)